1
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Why did Gregor Mendel use peas in his experiments?
A
Peas grow very slowly.B
Pea reproduction cannot be controlled.C
Peas normally produce very few offspring.D
Peas have characteristics that have two forms.2
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Duchenne muscular dystrophy is an X-linked recessive disorder. What is the probability that a female offspring of the cross that is shown above would have a recessive allele for Duchenne muscular dystrophy disorder?
A
0 percentB
25 percentC
50 percentD
100 percent3
Which term describes an organism that has identical alleles for a trait?
A
homozygousB
heterozygousC
dominantD
recessive4
A student recorded the height of each student in the school. She then made a bar graph of her results. She observed that the results form a bell-shaped curve. The student could use her graph as evidence to support which argument?
A
Height is affected by multiple pairs of genes on different chromosomes.B
The alleles for tall height and short height are codominant.C
The allele for being tall is dominant to the allele for shorter heights.D
There are three alleles for height that demonstrate incomplete dominance.
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